{% load mytags %}
{% get_sorting as sorting %}
<nav class="navbar navbar-default navbar-inverse ">
  <div class="container-fluid">
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">Brand</a>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <li class="active"><a href="{% url 'main:list' %}">首页 <span class="sr-only">(current)</span></a></li>
{#        {% get_sorting %}#}
            {% for g in sorting %}
                {% if g.children|length == 0 %}
                <li><a href="#">{{ g.name }}</a></li>
                {% else %}
                    <li class="dropdown">
                      <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">{{ g }} <span class="caret"></span></a>
                      <ul class="dropdown-menu">
                          {% for g2 in g.children %}
                        <li><a href="{% url 'main:list' %}?sorting={{ g2.id }}">{{ g2 }}</a></li>
                          {% endfor %}
                      </ul>
                    </li>
                {% endif %}
            {% endfor %}


      </ul>
      <form class="navbar-form navbar-left">
        <div class="form-group">
          <input type="text" class="form-control" placeholder="Search">
        </div>
        <button type="submit" class="btn btn-default">Submit</button>
      </form>
      <ul class="nav navbar-nav navbar-right">

          {% if request.user.is_authenticated %}
            <li><a href="{% url 'user:write' %}" role="button">添加</a></li>
          <li class="dropdown">

              <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">{{ request.user.username }} <span class="caret"></span></a>

              <ul class="dropdown-menu">

                <li><a href="{% url 'user:center' %}">个人中心</a></li>
                <li><a href="{% url 'user:list' %}">文章管理</a></li>
                <li><a href="{% url 'user:change_password' %}">修改密码</a></li>

                <li role="separator" class="divider"></li>
                <li><a href="{% url 'user:logout' %}">退出</a></li>
              </ul>
          </li>
          {% else %}
          <li><a href="{% url 'user:login' %}">登录</a></li>
          <li><a href="{% url 'user:register' %}">注册</a></li>
          {% endif %}


      </ul>
    </div><!-- /.navbar-collapse -->
  </div><!-- /.container-fluid -->
</nav>